JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
·
IF 4.233
Peng-Fan Gao,Yu-Xue Liu,Lening Zhang,Simin Zhang,Hong-Wei Li,Yuqing Wu,Lixin Wu
The present study constructed a competitive recognition system using cell receptor screening for human papillomavirus (HPV) invasion by using the hybrid-assembly of polyoxometalates (POMs) and cationic peptides as a platform. The fine tuning both of the surface charge of POMs and peptide sequence were precisely performed to develop a luminescence switch of POMs, leading to the establishment of a ternary system to identify which types of glycosaminoglycans (GAGs) are potential cell receptors for HPV infection. In addition, the method was successfully applied to construct a hybrid-assembly with the recombined HPV 16 L1 pentamers from Escherichia coli and perform GAGs screening, which validated the system’s potential for practical applications. In particular, the intrinsic mechanism for each competitive partner in the system was explained well by using isothermal titration calorimetry (ITC) and time-resolved fluorescence spectra. The present method will be helpful to extend the protocol to other systems by using peptides and POMs with similar properties, and ultimately, we hope it will promote the development of anti-viral agents.
研究领域:
生物化学
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病毒学
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分子生物学
✓ 已验证
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Qian-Qian Wang,Li-Hui Mao,Da-Xiang Wang,Yan-Mei Ma,Xin-Li Shi,Xi-Hao Tian
Two new solid photocatalysts, [Cu(Dione) 2 H 2 O] 2 Cl∙(PMo 12 O 40 ) (1) and [Cu(En) 2 H 2 O] 4 ∙[Cu(En) 2 (PW 12 O 40 )] 2 ∙(PW 12 O 40 ) 2 ·2H 2 O (2), were synthesized by hydrothermal method. Their structures were characterized by X-ray diffraction (XPRD), Fourier transform infrared (FT-IR), thermogravimetry (TG), X-ray photoelectron spectra (XPS), and UV–Vis diffuse reflection spectra (UV–Vis DRS). Their catalytic performances were tested in UV-irradiated solutions of cefalexin and ceftiofur. In complexes 1 and 2, there exist intramolecular hydrogen bonds. A three-dimensional (3D) structure is formed by hydrogen bonding in complex 1. The prepared complexes exhibit definite structures, good thermal stability, and high photocatalytic efficiency, particularly in acidic environments. The degradation rates of ceftiofur in the presence of complex 2 can reach 90.61%. They are also reusable after five rounds of repeated experiments.
研究领域:
环境科学
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材料科学
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药物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Zhongnan Guo,Fan Sun,Danilo Puggioni,Yubo Luo,Xiaotong Li,Xiuquan Zhou,Duck Young Chung,Erjian Cheng,Shiyan Li,James M. Rondinelli,Wenxia Yuan,Mercouri G. Kanatzidis
Metal cluster compounds have garnered renewed interest in the search for novel superconductors and topological semimetals owing to structural instabilities of metal-cluster geometries and broken symmetries. Here we synthesized needle-like crystals of the V-cluster-based quasi-one-dimensional (Q1D) materials AV3Q3Oδ (A = K, Rb, Cs, Q = Se, Te) which can also be viewed as being composed of parallel nanowires. We examine how changes in their average and local structure control their electronic properties. All compounds crystallize in the TlFe3Te3-type structure (P63/m space group) with infinite (V3Q3)− double-walled columnar chains separated by A+ cations. Our single-crystal and synchrotron powder diffraction studies indicate oxygen atoms partially occupy the center site of the V6 octahedral metal cluster cages in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35, whereas KV3Se3 is structurally oxygen-free. Our synchrotron X-ray pair distribution function (PDF) analyses indicate that the oxygen-free V6 cluster octahedra in KV3Se3 are highly distorted perpendicular to the chain direction even at room temperature, reducing the symmetry of the average structure from hexagonal P63/m to monoclinic P21/m. Our theoretical calculation supports this P21/m distortion and suggests the structure further distorts to P21 or P21/c at lower temperatures. In contrast, the oxygen-centered V-cluster in KV3Te3O0.33 exhibits a V3-triangle-trimerization along the chain direction. This feature is discernible from the local PDF and is consistent with lattice dynamical calculations based on density functional theory. Resistivity measurements indicate that KV3Se3 exhibits metallic behavior, whereas a dramatic metal–semiconductor–metal transition emerges in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35 because of oxygen disorder and changes in local structure captured from our electronic structure analyses of the Fermi surface. Our investigation of the AV3Q3Oδ family demonstrates the importance of understanding local changes in structure driven by electronic instabilities, which can guide the search for new quantum materials in other low-dimensional cluster-compound materials.
研究领域:
材料科学
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凝聚态物理
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 41
·期 1
·75-82
·
IF 5.56
Yanan Zhang,Junlei Chen,Fazal Razq,Chenyang Su,Xuehan Hou,Wenhuan Huang,Huabin Zhang
Comprehensive Summary Metal organic frameworks have been employed as high-performance layered double hydroxide (LDH) composite supercapacitor electrode materials but have shown unsatisfactory redox ability and stability. Herein, a host-guest CuMo-based polyoxometalate-based metal organic framework (POMOF) with copious electrochemically active sites and strong electrochemical redox activities has been effectively coupled with POM-incorporated CoNi-LDH to develop a nanocomposite (NENU-5@CoNi-LDH) by a simple solvothermal method. The designed electrode shows a high specific capacity of 333.61 mAh·g –1 at 1 A·g –1 . In addition, the novel hybrid symmetric supercapacitor NENU-5@CoNi-LDH/active carbon (AC) demonstrated a high energy density of 80.8 Wh·kg –1 at a power density of 750.7 W·kg –1 . Interestingly, the nanocomposite of NENU-5@CoNi-LDH exhibits an outstanding capacitance retention of 79% after 5000 charge-discharge cycles at 10 A·g –1 . This work provides a new strategy and will be the backbone for future energy storage research.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）